Novel Electrode System for Electroflotation of Wastewater

Chen, Xueming; Chen, Guohua; Yue, Po Lock

doi:10.1021/es011003u

Cited by 209Minerals Flotation and Separation TechniquesElectrocatalysts for Energy ConversionAdvanced oxidation water treatment

The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.

Novel Electrode System for Electroflotation of Wastewater

Chen, Xueming, Chen, Guohua, Yue, Po Lock·2002·Environmental Science & Technology

DOI 10.1021/es011003u

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Abstract

Electroflotation (EF) is an attractive method in wastewater treatment. The heart of EF is the dimensionally stable oxygen evolution anode that is usually expensive. In this paper, we present a stable anode by coating IrOx-Sb2O5-SnO2 onto titanium. Accelerated life test showed that the electrochemical stability of the Ti/IrOx-Sb2O5-SnO2 anode containing only 2.5 mol % of IrOx nominally in the activated coating was even higher than that of the conventional Ti/IrOx anode. Its service life for electroflotation application is predicted to be about 20 yr. Voltammetric investigation demonstrated that the Ti/IrOx-Sb2O5-SnO2 anode could provide fast electron transfer. Moreover, the present anode was designed to be fork-like and arranged interlockingly at the same level as the cathode with a similar shape. Such an innovation in electrode configuration and arrangement allows bubbles produced at both electrodes to be dispersed into wastewater flow quickly and, therefore, enhances the effective contact between bubbles and particles, favorable for high flotation efficiency. In addition, the novel electrode system reduces the interelectrode gap to 2 mm, a spacing that is technically difficult for a conventional electrode system. This small gap results in a significant energy saving. Easy maintenance is found to be another advantage of this novel electrode system.

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The removal efficiency of the EF process toward heavy metal is limited due to low O2 evolution overpotentials.
“The removal efficiency of the EF process toward heavy metal is limited due to low O 2 evolution overpotentials 107 .”
From Removal of heavy metal ions from wastewater: a comprehensive and critical review (2021) · cites this paper as [107]
Ti-based anodes were widely used in the EF process.
“It can be concluded that Ti-based anodes were widely used in the EF process 107 .”
From Removal of heavy metal ions from wastewater: a comprehensive and critical review (2021) · cites this paper as [107]

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Authors: Chen, X., Chen, G., & Yue, P. L.
Affiliations: Hong Kong University of Science and Technology (HK)
ORCID: Chen, Guohua
Venue: Environmental Science & Technology
Publisher: American Chemical Society (ACS)
Published: 2002-01-17
Volume: 36
Issue: 4
Pages: 778-783
ISSN: 0013-936X (ISSN-L)
1520-5851
DOI: 10.1021/es011003u
OpenAlex: W1968666510
Cited by: 206
References: 26
Citations by year: 2026: 3 · 2025: 4 · 2024: 11 · 2023: 12 · 2022: 9 · 2021: 14 · 2020: 7 · 2019: 12 · 2018: 10 · 2017: 5 · 2016: 13 · 2015: 9 · 2014: 13 · 2013: 11 · 2012: 6
FWCI: 7.09
Type: journal article
Language: en
Open access: closed
Locations: Environmental Science & Technology (publishedVersion)
PubMed (publishedVersion)
Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Topics: Physical Sciences › Chemical Engineering › Filtration and Separation › Minerals Flotation and Separation Techniques
Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
Keywords: electroflotation, wastewater treatment, titanium anode, electrochemical stability, anode service life, electron transfer, electrode configuration, bubble dispersion, flotation efficiency, energy conservation, electrode gap
MeSH terms: Coloring Agents, Electrochemistry, Electrodes, Equipment Design, Titanium, Waste Disposal, Fluid, Water Movements, Water Pollutants, Water Purification

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Novel Electrode System for Electroflotation of Wastewater

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